Not confident with automotive wiring? Have a professional harness builder or tuner do it, or check your work before first power-up. A wiring mistake can damage the ECU, the engine or the car, or start a fire.
100%
Stock ECU being replaced
GND
GND
SHADOW8-B-21 Digital input 10 / ignition switch
SHADOW8-B-12 Aux output 3
SHADOW8-B-8 Injector cylinder 7
ECM power (J271 relay feed)
0V sensor
SHADOW8-A-12 Analog voltage 3
0V sensor
SHADOW8-A-14 Analog voltage 5
0V sensor
SHADOW8-B-17 Aux output 8
SHADOW8-B-6 Injector cylinder 5
SHADOW8-A-10 Analog voltage 1
SHADOW8-A-26 Digital input 1
SHADOW8-A-23 CAN bus 1 low
SHADOW8-A-15 CAN bus 1 high
Battery constant +12V (term 30)
SHADOW8-B-13 Aux output 4
SHADOW8-B-7 Injector cylinder 6
SHADOW8-B-10 Aux output 1
SHADOW8-B-11 Aux output 2
SHADOW8-A-20 Analog voltage 8 (switchable 1k pull-up)
SHADOW8-A-21 Analog voltage 9 (switchable 1k pull-up)
5V ref
5V ref
SHADOW8-A-5 Crank position sensor
5V ref
SHADOW8-A-13 Analog voltage 4
SHADOW8-A-22 Analog voltage 10 (switchable 1k pull-up)
SHADOW8-A-6 Sync position sensor
SHADOW8-B-5 Injector cylinder 4
SHADOW8-B-3 Injector cylinder 2
0V sensor
0V sensor
SHADOW8-A-18 Analog voltage 6
SHADOW8-A-19 Analog voltage 7 (switchable 1k pull-up)
SHADOW8-B-30 Ignition TTL cylinder 4
SHADOW8-B-28 Ignition TTL cylinder 2
SHADOW8-B-2 Injector cylinder 1
SHADOW8-B-4 Injector cylinder 3
5V ref
5V ref
SHADOW8-A-11 Analog voltage 2
SHADOW8-B-27 Ignition TTL cylinder 1
SHADOW8-B-29 Ignition TTL cylinder 3
SHADOW8-B-14 Aux output 5
SHADOW8-B-15 Aux output 6
SHADOW8-A-16 Knock 1 +
SHADOW8-A-24 Knock 2 +
0V sensor
SHADOW8-B-16 Aux output 7
SHADOW8-B-22 Aux output 9
SHADOW8-B-23 Aux output 10
ECM + coil power (J271 relay feed)
OEM-T121
Stock ECU being replaced
1ECU ground
2ECU ground
3Ignition switch +12V (term 15)
5Wideband lambda heater (Z19)
9Secondary-air injection valve (N112)
21ECM power (J271 relay feed)
29MAF sensor ground (G70)
33Accelerator pedal position 1 (G79)
34Accelerator pedal position 1 ground (G79)
35Accelerator pedal position 2 (G185)
36Accelerator pedal position 2 ground (G185)
47Check engine light (MIL)
48EPC warning light
53MAF sensor signal (G70)
54Road speed signal (VSS)
58CAN bus low
60CAN bus high
62Battery constant +12V (term 30)
63Post-cat lambda heater (Z29)
64EVAP canister valve (N80)
65Fuel pump relay control
66Secondary-air pump relay (J299)
68Post-cat lambda signal (G130)
69Post-cat lambda signal (G130)
72Accelerator pedal position 1 5V supply (G79)
73Accelerator pedal position 2 5V supply (G185)
82Crank position sensor (G28)
83Throttle position sensor 5V supply (G187/G188)
84Throttle position sensor 1 (G187)
85Intake air temperature (G42)
86Camshaft position sensor (G40)
88Injector 4 (N33)
89Injector 2 (N31)
90Crank position sensor ground (G28)
91Throttle position sensor ground (G187/G188)
92Throttle position sensor 2 (G188)
93Engine coolant temperature (G62)
94Ignition coil 4 (N163)
95Ignition coil 2 (N128)
96Injector 1 (N30)
97Injector 3 (N32)
98Cam + boost sensor 5V supply (G40/G31)
99Knock sensor 5V supply (G61/G66)
101Boost pressure sensor (G31)
102Ignition coil 1 (N127)
103Ignition coil 3 (N158)
104Boost control solenoid (N75)
105Diverter valve (N249)
106Knock sensor 1 (G61)
107Knock sensor 2 (G66)
108Sensor ground
115VVT camshaft adjustment valve (N205)
117Throttle motor G186 (+)
118Throttle motor G186 (−)
121ECM + coil power (J271 relay feed)
SHADOW8
SHADOW8-A
SHADOW8
1ECU supply
35.0V sensor supply
40V analog reference
5Crank position sensor
6Sync position sensor
7Trigger ground
9Ground 1
10Analog voltage 1
11Analog voltage 2
12Analog voltage 3
13Analog voltage 4
14Analog voltage 5
15CAN bus 1 high
16Knock 1 +
18Analog voltage 6
19Analog voltage 7 (switchable 1k pull-up)
20Analog voltage 8 (switchable 1k pull-up)
21Analog voltage 9 (switchable 1k pull-up)
22Analog voltage 10 (switchable 1k pull-up)
23CAN bus 1 low
24Knock 2 +
26Digital input 1
34Ground 2
ECU supply
5V ref
0V sensor
OEM-T121-82 Crank position sensor (G28)
OEM-T121-86 Camshaft position sensor (G40)
0V sensor
GND
OEM-T121-53 MAF sensor signal (G70)
OEM-T121-101 Boost pressure sensor (G31)
OEM-T121-33 Accelerator pedal position 1 (G79)
OEM-T121-84 Throttle position sensor 1 (G187)
OEM-T121-35 Accelerator pedal position 2 (G185)
OEM-T121-60 CAN bus high
OEM-T121-106 Knock sensor 1 (G61)
OEM-T121-92 Throttle position sensor 2 (G188)
OEM-T121-93 Engine coolant temperature (G62)
OEM-T121-68 Post-cat lambda signal (G130)
OEM-T121-69 Post-cat lambda signal (G130)
OEM-T121-85 Intake air temperature (G42)
OEM-T121-58 CAN bus low
OEM-T121-107 Knock sensor 2 (G66)
OEM-T121-54 Road speed signal (VSS)
GND
SHADOW8-B
SHADOW8
1Battery constant (HOT) supply
2Injector cylinder 1
3Injector cylinder 2
4Injector cylinder 3
5Injector cylinder 4
6Injector cylinder 5
7Injector cylinder 6
8Injector cylinder 7
10Aux output 1
11Aux output 2
12Aux output 3
13Aux output 4
14Aux output 5
15Aux output 6
16Aux output 7
17Aux output 8
21Digital input 10 / ignition switch
22Aux output 9
23Aux output 10
26Aux 9–12 power supply
27Ignition TTL cylinder 1
28Ignition TTL cylinder 2
29Ignition TTL cylinder 3
30Ignition TTL cylinder 4
Battery constant (HOT) supply
OEM-T121-96 Injector 1 (N30)
OEM-T121-89 Injector 2 (N31)
OEM-T121-97 Injector 3 (N32)
OEM-T121-88 Injector 4 (N33)
OEM-T121-48 EPC warning light
OEM-T121-64 EVAP canister valve (N80)
OEM-T121-9 Secondary-air injection valve (N112)
OEM-T121-65 Fuel pump relay control
OEM-T121-66 Secondary-air pump relay (J299)
OEM-T121-5 Wideband lambda heater (Z19)
OEM-T121-63 Post-cat lambda heater (Z29)
OEM-T121-104 Boost control solenoid (N75)
OEM-T121-105 Diverter valve (N249)
OEM-T121-115 VVT camshaft adjustment valve (N205)
OEM-T121-47 Check engine light (MIL)
OEM-T121-3 Ignition switch +12V (term 15)
OEM-T121-117 Throttle motor G186 (+)
OEM-T121-118 Throttle motor G186 (−)
Aux 9–12 power supply
OEM-T121-102 Ignition coil 1 (N127)
OEM-T121-95 Ignition coil 2 (N128)
OEM-T121-103 Ignition coil 3 (N158)
OEM-T121-94 Ignition coil 4 (N163)
SP-GND · 5 pins
SP-0V · 9 pins
SP-14V · 5 pins
SP-5V1 · 7 pins
Press enter or space to select a node. You can then use the arrow keys to move the node around. Press delete to remove it and escape to cancel.
Press enter or space to select an edge. You can then press delete to remove it or escape to cancel.
62 / 62 connections
Columns ▾
Lengths need a layout. Add bundles in Layout.
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